31655-ZW2-F31 Coil Assembly - Overview. The 31655-ZW2-F31 Coil Assembly is an essential component of Honda marine engine ignition systems. This coil assembly plays a pivotal role in generating the spark required to ignite the fuel mixture, ensuring your engine runs smoothly and reliably. Built to meet Honda's strict factory specifications, it guarantees seamless integration with existing parts, maintaining optimal performance and durability in your marine engine.. Key Features. Genuine OEM Honda